Chris Brown and Nicole Scherzinger got a little kissy-kissy last night at Supperclub as surprised fans looked on ...

A source inside the club tells X17online.com exclusively:

"They were dancing close for a while and being all touchy-feely and finally Chris leaned into her. She put her head on his shoulder and they started kissing! I couldn't believe Chris was being so obvious about it!"

Chris Brown has been dating model Karrueche Tran since late 2011. Last week, however, Tran Tweeted "the end." The couple were rumored to have split in July but X17 photographer the two together as recently as Sept 16.

Nicole split with her longtime love Formula One racer Lewis Hamilton late last year but has been seen with him multiple times since. She's been linked to her Dancing With the Stars partner Derek Hough, her former X Factor US co-host Steve Jones, rapper Drake and others.